A quotation by Ferdinand Rudio

The whole form of mathematical thinking was created by Euler. It is only with the greatest of difficulty that one is able to follow the writings of any author preceding Euler, because it was not yet known how to let the formulas speak for themselves. This art Euler was the first to teach.
Quoted in D MacHale, Comic Sections (Dublin 1993)

JOC/EFR February 2006

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